Remove Test rules user guide and update README.md (#199)

Author: J-Binieda-ericsson

README.md

@@ -73,12 +73,6 @@ Visit [Eiffel Community](https://eiffel-community.github.io) to get started and
         - [**Example 1**](./wiki/MergeResolverRules.md#Example-1)   
         - [**Example 2 - array aggregations**](./wiki/MergeResolverRules.md#Example-2---array-aggregations)  
     - [**History Rules**](./wiki/History-rules.md)
-1. [**Test Rules User Guide**](./wiki/TestRulesUserGuide.md)
-    - [**Rule testing mechanism via "Test Rules" GUI interface**](./wiki/TestRulesUserGuide.md#Rule-testing-mechanism-via-Test-Rules-GUI-interface)
-    - [**Introduction**](./wiki/TestRulesUserGuide.md#Introduction)
-    - [**Aggregated object**](./wiki/TestRulesUserGuide.md#Aggregated-object)
-    - [**Rule set up**](./wiki/TestRulesUserGuide.md#Rule-set-up)
-    - [**The most common operation you would do**](./wiki/TestRulesUserGuide.md#The-most-common-operation-you-would-do)
 1. [**Subscriptions**](./wiki/Subscriptions.md)
     - [**REST POST notification**](./wiki/REST-POST-notification.md)
     - [**Email notification**](./wiki/Email-notification.md)